RDT-07-0122
17
®
NORD
fire
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FDMQ
Images are for illustrative purposes
We reserve the right to make changes
Fig. 18 Built in edge
“Wall edge sticker” indicates the recommended edge of installation of fire damper into the fire
partition structure (wall). The damper must be installed so that the entire damper blade - in the
closed position - is located inside the fire separating structure (wall) and at the same time the
control mechanism and inspection openings are freely accessible.
4.2 Installation opening dimensions
Fig. 19 Installation opening dimensions
4.3 Examples of fire damper installing
The fire damper can be integrated into a solid wall construction made e.g. of normal concrete/
masonry, porous concrete with minimum thickness 100 mm or into solid ceiling construction made
e.g. of normal concrete with minimum thickness 110 mm or porous concrete with minimum
thickness 125 mm. The fire damper can be integrated into a gypsum wall construction with fire
classification EI 120 or EI 90.
The fire damper can also be integrated outside the wall construction. Duct and the damper part
between the wall construction and the damper blade (labelled with BUILD IN EDGE on the
protective covering) must be protected with fire-fighting insulation.
If is damper installed outside a construction it is necessary to use reinforcement VRM.
27
"Wall edge sticker" indicates the recommended edge of installation of fire damper into the fire partition structure (wall).
The damper must be installed so that the entire damper blade - in the closed position - is located inside the fire separating structure
(wall) and at the same time the control mechanism and inspection openings are freely accessible.
The fire dampers are suitable for installation in arbitrary position in vertical and horizontal passages of fire
separating structures. The damper assembly procedures must be done so that all load transfer from the fire
separating constructions to the damper body is absolutely excluded. The back-to-back air-conditioning
piping must be suspended or supported so that all load transfer from the back-to-back piping to the damper
flanges is absolutely excluded. The gap between the installed damper and the building structure must be
perfectly filled with approved material all over its volume.
To provide the necessary space for access to the control device, all other items must be situated at least
350 mm from the control parts of the damper. At least one inspection hole must be accessible.
The damper must be installed so that the damper blade (in closed position) is situated in the fire separating
structure - marked by the label BUILD-IN EDGE on the damper body. If such solution is not possible, the
piping between the fire separating structure and the damper blade must be protected according to the
certified installation method, see Section 6.
During the installation and plastering process, the control mechanism must be protected (covered) against
damage and pollution. The damper body should not be deformed during bricking in. Once the damper is built
in, the damper blade should not grind on the damper body during opening or closing.
The distance between the fire damper and the structure (wall, ceiling) must be 75 mm at the minimum. If two
or more dampers are to be installed in one fire separating structure, the distance between adjacent dampers
must be 200 mm at the minimum, according to EN 1366-2 paragraph 13.5. For admissible exceptions see
Section 6.
375
260
50
Built in edge
Installation opening
* The recommended dimension of the installation opening
is from 25 mm to 50 mm on the both sides (it means from
A+50 to A+100 or B+50 to B+100)
Installation opening-
Weichschott system
